Le « Waffle House Index », ou comment les américains jaugent l’impact d’un évènement climatique grâce aux types de menus servis par une chaine de restaurants - WSJ.com
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Green means the restaurant is serving a full menu, a signal that damage in an area is limited and the lights are on. Yellow means a limited menu, indicating power from a generator, at best, and low food supplies. Red means the restaurant is closed, a sign of severe damage in the area or unsafe conditions.